Independence of measurements from clinical parameters
| Method | No of patients | MD (SD) (cm2) | Limits of agreement (cm2) | |
|---|---|---|---|---|
| MD − 2SD (95% CI) | MD + 2SD (95% CI) | |||
| AR, aortic regurgitation; AS, aortic stenosis; CI, confidence interval; MD, mean difference. | ||||
| Intraobserver variability normal output | 13 | −0.02 (0.05) | −0.12 (−0.18 to −0.07) | 0.08 (0.03 to 0.14) |
| Intraobserver variability low output | 7 | −0.02 (0.7) | −0.15 (−0.24 to −0.06) | 0.11 (0.02 to 0.20) |
| Interobserver variability normal output | 13 | 0.02 (0.05) | −0.08 (−0.14 to −0.03) | 0.12 (0.07 to 0.17) |
| Interobserver variability low output | 7 | 0.04 (0.04) | −0.04 (−0.10 to 0.01) | 0.12 (0.07 to 0.18) |
| Intraobserver variability high calcification | 8 | −0.04 (0.06) | −0.15 (−0.22 to −0.07) | 0.07 (0.00 to 0.15) |
| Intraobserver variability low calcification | 12 | −0.01 (0.06) | −0.12 (−0.18 to −0.06) | 0.10 (0.04 to 0.16) |
| Interobserver variability high calcification | 8 | 0.02 (0.05) | −0.08 (−0.15 to −0.01) | 0.13 (0.06 to 0.19) |
| Interobserver variability low calcification | 12 | 0.03 (0.05) | −0.07 (−0.12 to −0.02) | 0.13 (0.07 to 0.17) |
| Intraobserver variability isolated AS | 12 | −0.01 (0.05) | −0.11 (−0.17 to −0.06) | 0.09 (0.03 to 0.14) |
| Intraobserver variability concomitant AR | 8 | −0.03 (0.07) | −0.16 (−0.24 to −0.07) | 0.10 (0.01 to 0.18) |
| Interobserver variability isolated AS | 12 | 0.02 (0.05) | −0.09 (−0.15 to −0.03) | 0.12 (0.06 to 0.18) |
| Interobserver variability concomitant AR | 8 | 0.04 (0.04) | −0.04 (−0.08 to 0.02) | 0.12 (0.07 to 0.17) |